40
Table 4.7 Statistical Calculation on Gained Score of Experimental Class X and
Controlled Class Y
No. X
Y X
y x
2
y
2
1 4
4 -7.4
-5.53 54.76
30.5809 2
8 16
-3.4 6.47
11.56 41.8609
3 14
2 2.6
-7.53 6.76
56.7009 4
4 4
-7.4 -5.53
54.76 30.5809
5 14
12 2.6
2.47 6.76
6.1009 6
14 2
2.6 -7.53
6.76 56.7009
7 8
20 -3.4
10.47 11.56
109.6209 8
2 14
-9.4 4.47
88.36 19.9809
9 20
10 8.6
0.47 73.96
0.2209 10
14 16
2.6 6.47
6.76 41.8609
11 10
20 -1.4
10.47 1.96
109.6209 12
8 8
-3.4 -1.53
11.56 2.3409
13 12
-6 0.6
-15.53 0.36
241.1809 14
16 28
4.6 18.47
21.16 341.1409
15 12
10 0.6
0.47 0.36
0.2209 16
18 8
6.6 -1.53
43.56 2.3409
17 22
2 10.6
-7.53 112.36
56.7009 18
2 24
-9.4 14.47
88.36 209.3809
19 8
4 -3.4
-5.53 11.56
30.5809 20
4 -2
-7.4 -11.53
54.76 132.9409
21 10
6 -1.4
-3.53 1.96
12.4609 22
12 8
0.6 -1.53
0.36 2.3409
23 14
12 2.6
2.47 6.76
6.1009 24
16 6
4.6 -3.53
21.16 12.4609
25 8
12 -3.4
2.47 11.56
6.1009 26
16 4
4.6 -5.53
21.16 30.5809
41
No. X
Y X
y x
2
y
2
27 22
18 10.6
8.47 112.36
71.7409 28
10 6
-1.4 -3.53
1.96 12.4609
29 12
10 0.6
0.47 0.36
0.2209 30
8 8
-3.4 -1.53
11.56 2.3409
SUM 342
286 857.2
1677.467 AVG
11.4 9.53
28.57333 55.91557
Table 4.7 shows the total of gained score on Experimental Class X and Controlled Class Y. From the table above, the summation of gained score in
Experimental Class is 342 while in the Controlled Class it has 286. It means that gained score on Experimental Class is higher than the Controlled Class.
After calculating the gained score, the t-test formula was calculated as follows:
1. Determining mean of variable X Experiment Class:
�
�
=
∑ �
= =
.
2. Determining mean of variable Y Control Class:
� =
∑ �
= = .
3. Determining standard deviation of variable X:
� = √
∑ �
2
= √
5 .
= √ . = .
4. Determining standard deviation of variable Y:e
� = √
∑ �
2
= √
.
= √ . = .
5. Determining standard error of mean variable X:
� =
� √ −
=
5. √ −
=
5. 5.
= .
42
6. Determining standard error of mean variable Y:
� =
� √ −
=
. √ −
=
. 5.
= .
7. Determining standard error of different mean of variable x and mean of variable Y:
�
−
= √� + �
= √ .
+ . =
√ . + .
= √ .
= 1.69 8. Statistical t-test formula:
�
�=
�
− �
��−�
= . − .5 .
= .. = .
9. Determining t
t le
in significance level 0.05, with df degree of freedom df = N
x
+ N
y
– 2 = 30 + 30 – 2 = 58 From the calculation above, the df value is 58 and from degree of significant
value 0.05 or t
t
is 1.67.
10. Hypothesis Testing From the calculation above, the calculated t-test of t
was 1.10 and the degree of freedom df was 58. Furthermore, the degree significance that was used for
this research is 5 or 0.05, therefore from t
table
it was 1.67. Compared to the t
table,
the result of t was lower than t
table.
Those calculations were meant to know if video game has positive effect on students’ reading comprehension of narrative text on eighth grade students of
SMPN 96 Jakarta Selatan. Therefore, the hypotheses are: H
: Video Game has no positive effect on Students’ Reading Comprehension
of Narrative Text
H
1
: Video Game has a positive effect on students’ Reading Comprehension
of Narrative Text.
